static inline F32 mCbrt(F32 val)
{
if(val < 0.f)
return(-mPow(-val, F32(1.f/3.f)));
else
return(mPow(val, F32(1.f/3.f)));
}
void PSSMLightShadowMap::_calcSplitPos(const Frustum& currFrustum)
{
const F32 nearDist = 0.01f; // TODO: Should this be adjustable or different?
const F32 farDist = currFrustum.getFarDist();
for ( U32 i = 1; i < mNumSplits; i++ )
{
F32 step = (F32) i / (F32) mNumSplits;
F32 logSplit = nearDist * mPow(farDist / nearDist, step);
F32 linearSplit = nearDist + (farDist - nearDist) * step;
mSplitDist[i] = mLerp( linearSplit, logSplit, mClampF( mLogWeight, 0.0f, 1.0f ) );
}
mSplitDist[0] = nearDist;
mSplitDist[mNumSplits] = farDist;
}
ScatterSky::ScatterSky()
{
mPrimCount = 0;
mVertCount = 0;
// Rayleigh scattering constant.
mRayleighScattering = 0.0035f;
mRayleighScattering4PI = mRayleighScattering * 4.0f * M_PI_F;
// Mie scattering constant.
mMieScattering = 0.0045f;
mMieScattering4PI = mMieScattering * 4.0f * M_PI_F;
// Overall scatter scalar.
mSkyBrightness = 25.0f;
// The Mie phase asymmetry factor.
mMiePhaseAssymetry = -0.75f;
mSphereInnerRadius = 1.0f;
mSphereOuterRadius = 1.0f * 1.025f;
mScale = 1.0f / (mSphereOuterRadius - mSphereInnerRadius);
// 650 nm for red
// 570 nm for green
// 475 nm for blue
mWavelength.set( 0.650f, 0.570f, 0.475f, 0 );
mWavelength4[0] = mPow(mWavelength[0], 4.0f);
mWavelength4[1] = mPow(mWavelength[1], 4.0f);
mWavelength4[2] = mPow(mWavelength[2], 4.0f);
mRayleighScaleDepth = 0.25f;
mMieScaleDepth = 0.1f;
mAmbientColor.set( 0, 0, 0, 1.0f );
mAmbientScale.set( 1.0f, 1.0f, 1.0f, 1.0f );
mSunColor.set( 0, 0, 0, 1.0f );
mSunScale = ColorF::WHITE;
mFogColor.set( 0, 0, 0, 1.0f );
mFogScale = ColorF::WHITE;
mExposure = 1.0f;
mNightInterpolant = 0;
mShader = NULL;
mTimeOfDay = 0;
mSunAzimuth = 0.0f;
mSunElevation = 35.0f;
mMoonAzimuth = 0.0f;
mMoonElevation = 45.0f;
mBrightness = 1.0f;
mCastShadows = true;
mDirty = true;
mLight = LightManager::createLightInfo();
mLight->setType( LightInfo::Vector );
mFlareData = NULL;
mFlareState.clear();
mFlareScale = 1.0f;
mMoonEnabled = true;
mMoonScale = 0.2f;
mMoonTint.set( 0.192157f, 0.192157f, 0.192157f, 1.0f );
MathUtils::getVectorFromAngles( mMoonLightDir, 0.0f, 45.0f );
mMoonLightDir.normalize();
mMoonLightDir = -mMoonLightDir;
mNightCubemap = NULL;
mNightColor.set( 0.0196078f, 0.0117647f, 0.109804f, 1.0f );
mNightFogColor = mNightColor;
mUseNightCubemap = false;
mSunSize = 1.0f;
mMoonMatInst = NULL;
mNetFlags.set( Ghostable | ScopeAlways );
mTypeMask |= EnvironmentObjectType | LightObjectType | StaticObjectType;
_generateSkyPoints();
mMatrixSet = reinterpret_cast<MatrixSet *>(dMalloc_aligned(sizeof(MatrixSet), 16));
constructInPlace(mMatrixSet);
mColorizeAmt = 0;
mColorize.set(0,0,0);
}
void ScatterSky::unpackUpdate(NetConnection *con, BitStream *stream)
{
Parent::unpackUpdate(con, stream);
if ( stream->readFlag() ) // TimeMask
{
F32 temp = 0;
stream->read( &temp );
setAzimuth( temp );
stream->read( &temp );
setElevation( temp );
}
if ( stream->readFlag() ) // UpdateMask
{
stream->read( &mRayleighScattering );
stream->read( &mRayleighScattering4PI );
stream->read( &mMieScattering );
stream->read( &mMieScattering4PI );
stream->read( &mSunSize );
stream->read( &mSkyBrightness );
stream->read( &mMiePhaseAssymetry );
stream->read( &mSphereInnerRadius );
stream->read( &mSphereOuterRadius );
stream->read( &mScale );
ColorF tmpColor( 0, 0, 0 );
stream->read( &tmpColor );
stream->read( &mWavelength4[0] );
stream->read( &mWavelength4[1] );
stream->read( &mWavelength4[2] );
stream->read( &mRayleighScaleDepth );
stream->read( &mMieScaleDepth );
stream->read( &mNightColor );
stream->read( &mNightFogColor );
stream->read( &mAmbientScale );
stream->read( &mSunScale );
stream->read( &mFogScale );
F32 colorizeAmt;
stream->read( &colorizeAmt );
if(mColorizeAmt != colorizeAmt) {
mColorizeAmt = colorizeAmt;
mShader = NULL; //forces shader refresh
}
stream->read( &mColorize );
if ( tmpColor != mWavelength )
{
mWavelength = tmpColor;
mWavelength4[0] = mPow(mWavelength[0], 4.0f);
mWavelength4[1] = mPow(mWavelength[1], 4.0f);
mWavelength4[2] = mPow(mWavelength[2], 4.0f);
}
stream->read( &mExposure );
stream->read( &mBrightness );
mCastShadows = stream->readFlag();
stream->read( &mFlareScale );
if ( stream->readFlag() )
{
SimObjectId id = stream->readRangedU32( DataBlockObjectIdFirst, DataBlockObjectIdLast );
LightFlareData *datablock = NULL;
if ( Sim::findObject( id, datablock ) )
mFlareData = datablock;
else
{
con->setLastError( "ScatterSky::unpackUpdate() - invalid LightFlareData!" );
mFlareData = NULL;
}
}
else
mFlareData = NULL;
mMoonEnabled = stream->readFlag();
stream->read( &mMoonMatName );
stream->read( &mMoonScale );
stream->read( &mMoonTint );
mUseNightCubemap = stream->readFlag();
stream->read( &mNightCubemapName );
stream->read( &mMoonAzimuth );
stream->read( &mMoonElevation );
mLight->unpackExtended( stream );
if ( isProperlyAdded() )
{
mDirty = true;
_initMoon();
Sim::findObject( mNightCubemapName, mNightCubemap );
}
}
}
F32 ScatterSky::_getMiePhase( F32 fCos, F32 fCos2, F32 g, F32 g2)
{
return 1.5f * ((1.0f - g2) / (2.0f + g2)) * (1.0f + fCos2) / mPow(mFabs(1.0f + g2 - 2.0f*g*fCos), 1.5f);
}
void LightFlareData::prepRender( SceneRenderState *state, LightFlareState *flareState )
{
PROFILE_SCOPE( LightFlareData_prepRender );
const LightInfo *lightInfo = flareState->lightInfo;
if ( mIsZero( flareState->fullBrightness ) ||
mIsZero( lightInfo->getBrightness() ) )
return;
// Figure out the element count to render.
U32 elementCount = mElementCount;
const bool isReflectPass = state->isReflectPass();
if ( isReflectPass )
{
// Then we don't render anything this pass.
if ( !mRenderReflectPass )
return;
// Find the zero distance elements which make
// up the corona of the light flare.
elementCount = 0.0f;
for ( U32 i=0; i < mElementCount; i++ )
if ( mIsZero( mElementDist[i] ) )
elementCount++;
}
// Better have something to render.
if ( elementCount == 0 )
return;
U32 visDelta = U32_MAX;
F32 occlusionFade = 1.0f;
Point3F lightPosSS;
bool lightVisible = _testVisibility( state, flareState, &visDelta, &occlusionFade, &lightPosSS );
// We can only skip rendering if the light is not
// visible, and it has elapsed the fade out time.
if ( mIsZero( occlusionFade ) ||
!lightVisible && visDelta > FadeOutTime )
return;
const RectI &viewport = GFX->getViewport();
Point3F oneOverViewportExtent( 1.0f / (F32)viewport.extent.x, 1.0f / (F32)viewport.extent.y, 0.0f );
// Really convert it to screen space.
lightPosSS.x -= viewport.point.x;
lightPosSS.y -= viewport.point.y;
lightPosSS *= oneOverViewportExtent;
lightPosSS = ( lightPosSS * 2.0f ) - Point3F::One;
lightPosSS.y = -lightPosSS.y;
lightPosSS.z = 0.0f;
// Take any projection offset into account so that the point where the flare's
// elements converge is at the 'eye' point rather than the center of the viewport.
const Point2F& projOffset = state->getCameraFrustum().getProjectionOffset();
Point3F flareVec( -lightPosSS + Point3F(projOffset.x, projOffset.y, 0.0f) );
const F32 flareLength = flareVec.len();
if ( flareLength > 0.0f )
flareVec *= 1.0f / flareLength;
// Setup the flare quad points.
Point3F rotatedBasePoints[4];
dMemcpy(rotatedBasePoints, sBasePoints, sizeof( sBasePoints ));
// Rotate the flare quad.
F32 rot = mAcos( -1.0f * flareVec.x );
rot *= flareVec.y > 0.0f ? -1.0f : 1.0f;
MathUtils::vectorRotateZAxis( rot, rotatedBasePoints, 4 );
// Here we calculate a the light source's influence on
// the effect's size and brightness.
// Scale based on the current light brightness compared to its normal output.
F32 lightSourceBrightnessScale = lightInfo->getBrightness() / flareState->fullBrightness;
const Point3F &camPos = state->getCameraPosition();
const Point3F &lightPos = flareState->lightMat.getPosition();
const bool isVectorLight = lightInfo->getType() == LightInfo::Vector;
// Scale based on world space distance from camera to light source.
F32 distToCamera = ( camPos - lightPos ).len();
F32 lightSourceWSDistanceScale = isVectorLight && distToCamera > 0.0f ? 1.0f : getMin( 10.0f / distToCamera, 10.0f );
// Scale based on screen space distance from screen position of light source to the screen center.
F32 lightSourceSSDistanceScale = getMax( ( 1.5f - flareLength ) / 1.5f, 0.0f );
// Scale based on recent visibility changes, fading in or out.
F32 fadeInOutScale = 1.0f;
if ( lightVisible &&
visDelta < FadeInTime &&
flareState->occlusion > 0.0f )
fadeInOutScale = (F32)visDelta / (F32)FadeInTime;
else if ( !lightVisible &&
visDelta < FadeOutTime )
fadeInOutScale = 1.0f - (F32)visDelta / (F32)FadeOutTime;
// This combined scale influences the size of all elements this effect renders.
// Note we also add in a scale that is user specified in the Light.
F32 lightSourceIntensityScale = lightSourceBrightnessScale *
lightSourceWSDistanceScale *
lightSourceSSDistanceScale *
fadeInOutScale *
flareState->scale *
occlusionFade;
if ( mIsZero( lightSourceIntensityScale ) )
return;
// The baseColor which modulates the color of all elements.
//
// These are the factors which affect the "alpha" of the flare effect.
// Modulate more in as appropriate.
ColorF baseColor = ColorF::WHITE * lightSourceBrightnessScale * occlusionFade;
// Setup the vertex buffer for the maximum flare elements.
const U32 vertCount = 4 * mElementCount;
if ( flareState->vertBuffer.isNull() ||
flareState->vertBuffer->mNumVerts != vertCount )
flareState->vertBuffer.set( GFX, vertCount, GFXBufferTypeDynamic );
GFXVertexPCT *vert = flareState->vertBuffer.lock();
const Point2F oneOverTexSize( 1.0f / (F32)mFlareTexture.getWidth(), 1.0f / (F32)mFlareTexture.getHeight() );
for ( U32 i = 0; i < mElementCount; i++ )
{
// Skip non-zero elements for reflections.
if ( isReflectPass && mElementDist[i] > 0.0f )
continue;
Point3F *basePos = mElementRotate[i] ? rotatedBasePoints : sBasePoints;
ColorF color( baseColor * mElementTint[i] );
if ( mElementUseLightColor[i] )
color *= lightInfo->getColor();
color.clamp();
Point3F pos( lightPosSS + flareVec * mElementDist[i] * flareLength );
const RectF &rect = mElementRect[i];
Point3F size( rect.extent.x, rect.extent.y, 1.0f );
size *= mElementScale[i] * mScale * lightSourceIntensityScale;
AssertFatal( size.x >= 0.0f, "LightFlareData::prepRender - Got a negative element size?" );
if ( size.x < 100.0f )
{
F32 alphaScale = mPow( size.x / 100.0f, 2 );
color *= alphaScale;
}
Point2F texCoordMin, texCoordMax;
texCoordMin = rect.point * oneOverTexSize;
texCoordMax = ( rect.point + rect.extent ) * oneOverTexSize;
size.x = getMax( size.x, 1.0f );
size.y = getMax( size.y, 1.0f );
size *= oneOverViewportExtent;
vert->color = color;
vert->point = ( basePos[0] * size ) + pos;
vert->texCoord.set( texCoordMin.x, texCoordMax.y );
vert++;
vert->color = color;
vert->point = ( basePos[1] * size ) + pos;
vert->texCoord.set( texCoordMax.x, texCoordMax.y );
vert++;
vert->color = color;
vert->point = ( basePos[2] * size ) + pos;
vert->texCoord.set( texCoordMax.x, texCoordMin.y );
vert++;
vert->color = color;
vert->point = ( basePos[3] * size ) + pos;
vert->texCoord.set( texCoordMin.x, texCoordMin.y );
vert++;
}
flareState->vertBuffer.unlock();
RenderPassManager *rpm = state->getRenderPass();
// Create and submit the render instance.
ParticleRenderInst *ri = rpm->allocInst<ParticleRenderInst>();
ri->type = RenderPassManager::RIT_Particle;
ri->vertBuff = &flareState->vertBuffer;
ri->primBuff = &mFlarePrimBuffer;
ri->translucentSort = true;
ri->sortDistSq = ( lightPos - camPos ).lenSquared();
ri->modelViewProj = &MatrixF::Identity;
ri->bbModelViewProj = &MatrixF::Identity;
ri->count = elementCount;
ri->blendStyle = ParticleRenderInst::BlendGreyscale;
ri->diffuseTex = mFlareTexture;
ri->softnessDistance = 1.0f;
ri->defaultKey = ri->diffuseTex ? (U32)ri->diffuseTex : (U32)ri->vertBuff; // Sort by texture too.
// NOTE: Offscreen partical code is currently disabled.
ri->systemState = PSS_AwaitingHighResDraw;
rpm->addInst( ri );
}
void PxSingleActor::_updateContainerForces()
{
if ( !mWorld->getEnabled() )
return;
PROFILE_SCOPE( PxSingleActor_updateContainerForces );
// Update container drag and buoyancy properties
ContainerQueryInfo info;
info.box = getWorldBox();
info.mass = getMass();
// Find and retreive physics info from intersecting WaterObject(s)
mContainer->findObjects( getWorldBox(), WaterObjectType|PhysicalZoneObjectType, findRouter, &info );
// Calculate buoyancy and drag
F32 angDrag = mBuildAngDrag;
F32 linDrag = mBuildLinDrag;
F32 buoyancy = 0.0f;
if ( true ) //info.waterCoverage >= 0.1f)
{
F32 waterDragScale = info.waterViscosity * mDataBlock->waterDragScale;
F32 powCoverage = mPow( info.waterCoverage, 0.25f );
if ( info.waterCoverage > 0.0f )
{
//angDrag = mBuildAngDrag * waterDragScale;
//linDrag = mBuildLinDrag * waterDragScale;
angDrag = mLerp( mBuildAngDrag, mBuildAngDrag * waterDragScale, powCoverage );
linDrag = mLerp( mBuildLinDrag, mBuildLinDrag * waterDragScale, powCoverage );
}
buoyancy = ( info.waterDensity / mDataBlock->buoyancyDensity ) * mPow( info.waterCoverage, 2.0f );
}
// Apply drag (dampening)
mActor->setLinearDamping( linDrag );
mActor->setAngularDamping( angDrag );
// Apply buoyancy force
if ( buoyancy != 0 )
{
// A little hackery to prevent oscillation
// Based on this blog post (http://reinot.blogspot.com/2005/11/oh-yes-they-float-georgie-they-all.html)
// JCF: DISABLED
NxVec3 gravity;
mWorld->getScene()->getGravity(gravity);
//NxVec3 velocity = mActor->getLinearVelocity();
NxVec3 buoyancyForce = buoyancy * -gravity * TickSec;
//F32 currHeight = getPosition().z;
//const F32 C = 2.0f;
//const F32 M = 0.1f;
//if ( currHeight + velocity.z * TickSec * C > info.waterHeight )
// buoyancyForce *= M;
mActor->addForceAtPos( buoyancyForce, mActor->getCMassGlobalPosition(), NX_IMPULSE );
}
// Apply physical zone forces
if ( info.appliedForce.len() > 0.001f )
mActor->addForceAtPos( pxCast<NxVec3>(info.appliedForce), mActor->getCMassGlobalPosition(), NX_IMPULSE );
}
void pow(wint p){
mPow(res,mat,p);
memcpy(mat,res,n*size*sizeof(tmp[0][0]));
}
void LightFlareData::prepRender( SceneState *state, LightFlareState *flareState )
{
PROFILE_SCOPE( LightFlareData_prepRender );
// No elements then nothing to render.
if ( mElementCount == 0 )
return;
// We need these all over the place later.
const Point3F &camPos = state->getCameraPosition();
const RectI &viewport = GFX->getViewport();
const Point3F &lightPos = flareState->lightMat.getPosition();
LightInfo *lightInfo = flareState->lightInfo;
bool isVectorLight = lightInfo->getType() == LightInfo::Vector;
// Perform visibility testing on the light...
// Project the light position from world to screen space, we need this
// position later, and it tells us if it is actually onscreen.
Point3F lightPosSS;
bool onscreen = MathUtils::mProjectWorldToScreen( lightPos, &lightPosSS, viewport, GFX->getWorldMatrix(), gClientSceneGraph->getNonClipProjection() );
U32 visDelta = U32_MAX;
U32 fadeOutTime = 20;
U32 fadeInTime = 125;
// Fade factor based on amount of occlusion.
F32 occlusionFade = 1.0f;
bool lightVisible = true;
if ( !state->isReflectPass() )
{
// It is onscreen, so raycast as a simple occlusion test.
U32 losMask = STATIC_COLLISION_MASK |
ShapeBaseObjectType |
StaticTSObjectType |
ItemObjectType |
PlayerObjectType;
GameConnection *conn = GameConnection::getConnectionToServer();
if ( !conn )
return;
bool needsRaycast = true;
// NOTE: if hardware does not support HOQ it will return NULL
// and we will retry every time but there is not currently a good place
// for one-shot initialization of LightFlareState
if ( flareState->occlusionQuery == NULL )
flareState->occlusionQuery = GFX->createOcclusionQuery();
if ( flareState->fullPixelQuery == NULL )
flareState->fullPixelQuery = GFX->createOcclusionQuery();
if ( flareState->occlusionQuery &&
( ( isVectorLight && flareState->worldRadius > 0.0f ) ||
( !isVectorLight && mOcclusionRadius > 0.0f ) ) )
{
// Always treat light as onscreen if using HOQ
// it will be faded out if offscreen anyway.
onscreen = true;
U32 pixels = -1;
GFXOcclusionQuery::OcclusionQueryStatus status = flareState->occlusionQuery->getStatus( true, &pixels );
String str = flareState->occlusionQuery->statusToString( status );
Con::setVariable( "$Flare::OcclusionStatus", str.c_str() );
Con::setIntVariable( "$Flare::OcclusionVal", pixels );
if ( status == GFXOcclusionQuery::Occluded )
occlusionFade = 0.0f;
if ( status != GFXOcclusionQuery::Unset )
needsRaycast = false;
RenderPassManager *pass = state->getRenderPass();
OccluderRenderInst *ri = pass->allocInst<OccluderRenderInst>();
Point3F scale( Point3F::One );
if ( isVectorLight && flareState->worldRadius > 0.0f )
scale *= flareState->worldRadius;
else
scale *= mOcclusionRadius;
ri->type = RenderPassManager::RIT_Occluder;
ri->query = flareState->occlusionQuery;
ri->query2 = flareState->fullPixelQuery;
ri->position = lightPos;
ri->scale = scale;
ri->orientation = pass->allocUniqueXform( lightInfo->getTransform() );
ri->isSphere = true;
state->getRenderPass()->addInst( ri );
if ( status == GFXOcclusionQuery::NotOccluded )
{
U32 fullPixels;
flareState->fullPixelQuery->getStatus( true, &fullPixels );
occlusionFade = (F32)pixels / (F32)fullPixels;
// Approximation of the full pixel count rather than doing
// two queries, but it is not very accurate.
/*
F32 dist = ( camPos - lightPos ).len();
F32 radius = scale.x;
radius = ( radius / dist ) * state->getWorldToScreenScale().y;
occlusionFade = (F32)pixels / (4.0f * radius * radius);
occlusionFade = mClampF( occlusionFade, 0.0f, 1.0f );
*/
}
}
Con::setFloatVariable( "$Flare::OcclusionFade", occlusionFade );
if ( needsRaycast )
{
// Use a raycast to determine occlusion.
bool fps = conn->isFirstPerson();
GameBase *control = conn->getControlObject();
if ( control && fps )
control->disableCollision();
RayInfo rayInfo;
if ( gClientContainer.castRayRendered( camPos, lightPos, losMask, &rayInfo ) )
occlusionFade = 0.0f;
if ( control && fps )
control->enableCollision();
}
lightVisible = onscreen && occlusionFade > 0.0f;
// To perform a fade in/out when we gain or lose visibility
// we must update/store the visibility state and time.
U32 currentTime = Sim::getCurrentTime();
if ( lightVisible != flareState->visible )
{
flareState->visible = lightVisible;
flareState->visChangedTime = currentTime;
}
// Save this in the state so that we have it during the reflect pass.
flareState->occlusion = occlusionFade;
visDelta = currentTime - flareState->visChangedTime;
}
else // state->isReflectPass()
{
occlusionFade = flareState->occlusion;
lightVisible = flareState->visible;
visDelta = Sim::getCurrentTime() - flareState->visChangedTime;
}
// We can only skip rendering if the light is not visible, and it
// has elapsed the fadeOutTime.
if ( !lightVisible && visDelta > fadeOutTime )
return;
// In a reflection we only render the elements with zero distance.
U32 elementCount = mElementCount;
if ( state->isReflectPass() )
{
elementCount = 0;
for ( ; elementCount < mElementCount; elementCount++ )
{
if ( mElementDist[elementCount] > 0.0f )
break;
}
}
if ( elementCount == 0 )
return;
// A bunch of preparatory math before generating verts...
const Point2I &vpExtent = viewport.extent;
Point3F viewportExtent( vpExtent.x, vpExtent.y, 1.0f );
Point2I halfViewportExtentI( viewport.extent / 2 );
Point3F halfViewportExtentF( (F32)halfViewportExtentI.x * 0.5f, (F32)halfViewportExtentI.y, 0.0f );
Point3F screenCenter( 0,0,0 );
Point3F oneOverViewportExtent( 1.0f / viewportExtent.x, 1.0f / viewportExtent.y, 1.0f );
lightPosSS.y -= viewport.point.y;
lightPosSS *= oneOverViewportExtent;
lightPosSS = ( lightPosSS * 2.0f ) - Point3F::One;
lightPosSS.y = -lightPosSS.y;
lightPosSS.z = 0.0f;
Point3F flareVec( screenCenter - lightPosSS );
F32 flareLength = flareVec.len();
flareVec.normalizeSafe();
Point3F basePoints[4];
basePoints[0] = Point3F( -0.5, 0.5, 0.0 );
basePoints[1] = Point3F( -0.5, -0.5, 0.0 );
basePoints[2] = Point3F( 0.5, -0.5, 0.0 );
basePoints[3] = Point3F( 0.5, 0.5, 0.0 );
Point3F rotatedBasePoints[4];
rotatedBasePoints[0] = basePoints[0];
rotatedBasePoints[1] = basePoints[1];
rotatedBasePoints[2] = basePoints[2];
rotatedBasePoints[3] = basePoints[3];
Point3F fvec( -1, 0, 0 );
F32 rot = mAcos( mDot( fvec, flareVec ) );
Point3F rvec( 0, -1, 0 );
rot *= mDot( rvec, flareVec ) > 0.0f ? 1.0f : -1.0f;
vectorRotateZAxis( rotatedBasePoints[0], rot );
vectorRotateZAxis( rotatedBasePoints[1], rot );
vectorRotateZAxis( rotatedBasePoints[2], rot );
vectorRotateZAxis( rotatedBasePoints[3], rot );
// Here we calculate a the light source's influence on the effect's size
// and brightness...
// Scale based on the current light brightness compared to its normal output.
F32 lightSourceBrightnessScale = lightInfo->getBrightness() / flareState->fullBrightness;
// Scale based on world space distance from camera to light source.
F32 lightSourceWSDistanceScale = ( isVectorLight ) ? 1.0f : getMin( 10.0f / ( lightPos - camPos ).len(), 1.5f );
// Scale based on screen space distance from screen position of light source to the screen center.
F32 lightSourceSSDistanceScale = ( 1.5f - ( lightPosSS - screenCenter ).len() ) / 1.5f;
// Scale based on recent visibility changes, fading in or out.
F32 fadeInOutScale = 1.0f;
if ( lightVisible && visDelta < fadeInTime && flareState->occlusion )
fadeInOutScale = (F32)visDelta / (F32)fadeInTime;
else if ( !lightVisible && visDelta < fadeOutTime )
fadeInOutScale = 1.0f - (F32)visDelta / (F32)fadeOutTime;
// This combined scale influences the size of all elements this effect renders.
// Note we also add in a scale that is user specified in the Light.
F32 lightSourceIntensityScale = lightSourceBrightnessScale *
lightSourceWSDistanceScale *
lightSourceSSDistanceScale *
fadeInOutScale *
flareState->scale *
occlusionFade;
// The baseColor which modulates the color of all elements.
ColorF baseColor;
if ( flareState->fullBrightness == 0.0f )
baseColor = ColorF::BLACK;
else
// These are the factors which affect the "alpha" of the flare effect.
// Modulate more in as appropriate.
baseColor = ColorF::WHITE * lightSourceBrightnessScale * occlusionFade;
// Fill in the vertex buffer...
const U32 vertCount = 4 * elementCount;
if ( flareState->vertBuffer.isNull() ||
flareState->vertBuffer->mNumVerts != vertCount )
flareState->vertBuffer.set( GFX, vertCount, GFXBufferTypeDynamic );
GFXVertexPCT *pVert = flareState->vertBuffer.lock();
const Point2I &widthHeightI = mFlareTexture.getWidthHeight();
Point2F oneOverTexSize( 1.0f / (F32)widthHeightI.x, 1.0f / (F32)widthHeightI.y );
for ( U32 i = 0; i < elementCount; i++ )
{
Point3F *basePos = mElementRotate[i] ? rotatedBasePoints : basePoints;
ColorF elementColor( baseColor * mElementTint[i] );
if ( mElementUseLightColor[i] )
elementColor *= lightInfo->getColor();
Point3F elementPos;
elementPos = lightPosSS + flareVec * mElementDist[i] * flareLength;
elementPos.z = 0.0f;
F32 maxDist = 1.5f;
F32 elementDist = mSqrt( ( elementPos.x * elementPos.x ) + ( elementPos.y * elementPos.y ) );
F32 distanceScale = ( maxDist - elementDist ) / maxDist;
distanceScale = 1.0f;
const RectF &elementRect = mElementRect[i];
Point3F elementSize( elementRect.extent.x, elementRect.extent.y, 1.0f );
elementSize *= mElementScale[i] * distanceScale * mScale * lightSourceIntensityScale;
if ( elementSize.x < 100.0f )
{
F32 alphaScale = mPow( elementSize.x / 100.0f, 2 );
elementColor *= alphaScale;
}
elementColor.clamp();
Point2F texCoordMin, texCoordMax;
texCoordMin = elementRect.point * oneOverTexSize;
texCoordMax = ( elementRect.point + elementRect.extent ) * oneOverTexSize;
pVert->color = elementColor;
pVert->point = ( basePos[0] * elementSize * oneOverViewportExtent ) + elementPos;
pVert->texCoord.set( texCoordMin.x, texCoordMax.y );
pVert++;
pVert->color = elementColor;
pVert->point = ( basePos[1] * elementSize * oneOverViewportExtent ) + elementPos;
pVert->texCoord.set( texCoordMax.x, texCoordMax.y );
pVert++;
pVert->color = elementColor;
pVert->point = ( basePos[2] * elementSize * oneOverViewportExtent ) + elementPos;
pVert->texCoord.set( texCoordMax.x, texCoordMin.y );
pVert++;
pVert->color = elementColor;
pVert->point = ( basePos[3] * elementSize * oneOverViewportExtent ) + elementPos;
pVert->texCoord.set( texCoordMin.x, texCoordMin.y );
pVert++;
}
flareState->vertBuffer.unlock();
// Create and submit the render instance...
RenderPassManager *renderManager = state->getRenderPass();
ParticleRenderInst *ri = renderManager->allocInst<ParticleRenderInst>();
ri->vertBuff = &flareState->vertBuffer;
ri->primBuff = &mFlarePrimBuffer;
ri->translucentSort = true;
ri->type = RenderPassManager::RIT_Particle;
ri->sortDistSq = ( lightPos - camPos ).lenSquared();
ri->modelViewProj = &MatrixF::Identity;
ri->bbModelViewProj = ri->modelViewProj;
ri->count = elementCount;
// Only draw the light flare in high-res mode, never off-screen mode
ri->systemState = ParticleRenderInst::AwaitingHighResDraw;
ri->blendStyle = ParticleRenderInst::BlendGreyscale;
ri->diffuseTex = &*(mFlareTexture);
ri->softnessDistance = 1.0f;
// Sort by texture too.
ri->defaultKey = ri->diffuseTex ? (U32)ri->diffuseTex : (U32)ri->vertBuff;
renderManager->addInst( ri );
}